The black markings on the outside of the back legs help identify this grasshopper. A major crop pest here in the US, I am only a few hundred yards from a corn field and I have these guys all over my yard, especially in the tall, native grasses I grow along my fence line.

Photo taken with the Canon Digital Rebel XT / 350D and the Sigma 70-300mm Lens on October 5, 2008 in Davenport, Iowa.